Sterilizer.



No. 637,796. Patented Novk28, I899. 0. H. &. W. M. JEWELL.

STERILIZER.

(Application filed Mar. 26. 1897.1

2 Sheets-Shet l.

(No Model.)

1 1: NORRIS PETER; n-qgw-umu wasnma'ron. o. c

No. 637,796, Patented Nov. 28, I899.

0. H. 6. W. M. JEWELL. STEBILIZEB.

(Application filed Mar. 26, 1897.) (No Model.) 2 Sheets-Sheet 2.

m: mums PETERS 0o. moroumcn WASHINGTON n c UNITE STATES PATENT OFFICE.

OMAR H. J EIVELL AND WILLIAM M. JEWELL, OF CHICAGO, ILLINOIS, ASSIGN- ORS TO THE 0. H. JEWELL FILTER COMPANY, OF SAME PLACE.

STERILIZER.

SPECIFICATION forming part of Letters Patent No. 637,796, dated November 28, 1899.

Application filed March 26, 1897- To all whom it may concern:

Be it known thatwe, OMAR H. JEWELL and WILLIAM M. J EWELL, citizens of the United States, residing in Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Sterilizers, whereof the following is a specification.

The object of our invention is to provide a new and improved sterilizing apparatus, and particularly one which will be well adapted for use in sterilizing water for potable purposes.

To this end our invention consists in providing an apparatus comprising means for killing all germs and means for afterward removing such germs, together with such other impurities as may be contained in the water or other liquid to be sterilized.

More particularly stated, said invention consists in providing a suitable receptacle adapted to contain the water to be sterilized, with means for heating the water therein contained to a sufficiently-high temperature to sterilize it, and with means for filtering the water after heating to remove the impurities therein contained,and also in providing means for cleansing the receptacle when necessary.

Our invention also comprises the particular arrangements and combinations hereinafter described, and specifically pointed out in the claims.

Referring to the drawings, Figure 1 is a vertical section of our improved apparatus. Fig. 2 is an elevation of the same on a reduced scale. Fig. 3 is a horizontal section on line 3 3 of Fig. 1. Fig. 4 is a horizontal section on line 4 4 of Fig. 1. Fig. 5 is an enlarged detail, being a sectional View showing one of the valves.

As shown in the drawings, 6 indicates a tank of sheet metal or other suitable material, said tank being closed and adapted to contain the liquid to be purified. The bottom 7 of the tank 6 is preferably made concave, as shown in Fig. 1.

8 indicates a fire-pot the lower portion of which is surrounded by a water-jacket 9, as shown in Fig. 1.

10 indicates the door of the fire-pot. v

11 indicates a' peripheral flange formed at the upper portion of the fire-pot 8-, which is Serial No. 629,295. (No model.

adapted toreceive and support the tank 6. A channel is provided in the outer surface of said flange to prevent displacement of the tank, and, as shown, said channel is somewhat wider than the lower edge of the tank in order to allow for expansion.

As shown in the drawings, the fire-pot 8 is preferably made in several sections for facilitating casting.

12 indicates the smoke-pipe of the fire-pot 8. As herein shown, the smoke-pipe 12 extends over said fire-pot up through the tank 6, and this construction is advantageous in that the smoke and heated gases passing up through said smoke-pipe serve to heat the water in the tan k, and therefore the construction shown is the most approved form of the invention. We do not wish to be limited, however, to the arrangement of the smoke-pipe as shown, as in some some cases said smoke-pipe may be otherwise arranged-ms, for instance, where the means for heating the water in the tank are ample without utilizing the heat of the gases from the fire-pot.

13 indicates a filter-tank open at the top, which filter-tank is arranged in the tank 6 near the lower portion thereof, as shown in Fig. 1. The filter-tank 13 is adapted to contain a. suitable bed of filtering material, such as sand or crushed quartz.

14 indicates a hollow casting, which is arranged immediately below the filter-tank 13 and communicates therewith by means of strainers 15 of the type commonly used in filters. The strainers serve to prevent the sand or other filtering material from entering the casting 14. As best shown in Fig. 1, the inner portion of the casting 14 is beveled or inclined, for purposes which will be hereinafter stated.

The casting 14 is supported upon legs 16 at one side and at its opposite side by means of a boss 17, which receives a screw-threaded pipe 18, extending through the wall of the tank 6, as shown in Fig. 1. A lock-nut 19 serves to prevent loosening of said pipe.

The pipe 18 is connected to a pipe 20, arranged beside the apparatus, preferably in a vertical position, which pipe communicates through a branch-21 with a water-supply. A valve 22 opposite the outer end of the pipe 18 .in Fig. 5.

pipe below the valve 22.

serves to open or close communication b'e forthe purpose of shutting off communica tion between the upper and lower portions of the pipe 20.

vided with a valve 25, said outlet-pipe comm unicating with the pipe 18,as show'n in Fig.2.

26 indicates a pipe which communicates with the pipe 20 below the valve 23 and with the tank 6 near the lower portion thereof, as

shown in Fig. 1.

27 indicates a f resh-water coil which isar- 'rarigedjn the tank 6 at the upper portion thereof and corn municates at one e-ndwith the.

upper end of the pipe 20 by means of a pipe 28.

29 indicates a valve for closing communication between-the pipe 20 and the coil 27.--

. 30 indicates a pipe which communicates with the upper end of the coil 27 and serves 25.

- -34; indicates a central flue extending up "through the filter-tank 13 and partially through'thecoil 27, as shown in Fig. 1. The flue 34'is preferably made in sections, as

24 indicates a pure-water outlet-pipe pro-;

heatingofi the water is accomplished either by: steam or. by heat from the fire-box 8. When steam isused, it is passed through the coil 31 at the bottom of the tank 6. The water immediately, surrounding said coil being thereby heated risesthrough the flue 34, the colder'waternearthe outside of the tank descending, so that a regular circulation is ob- 1 tained, until all the water in the tank is heated When heat from to the proper temperature. the fire-box 8 is used, the circulation of the water issubstantially the same; and it is materiall y assisted by heat from the smoke-pipe 12, which causes the water immediately surrounding said pipe to flow upward. .In this operation the beveled form of thecasting 14 is a material benefit, as it facilitates the passage ofthe water toithe flue 34. The arrangement of the filte-r-bedwithin the tank 6 is especially advantageous, for 'thecreason' that the filter-bed is thereby sterilized also by the heated water.- Afterthe water has-been sufficiently sterilized-.byheat the valve 29 is opened, permitting cold water to flowth'rough thecoil 27 to cool the water in the tank, said -water circulating continuously through the coil 27, being discharged through the pipe 30.

.The valve 25 in'the pure-water pipe is then opened, permitting the water in the tank 6 to pass vdownward throughthe filter-bed and casting 14 to the pure-water outlet-pipe 24, whence it may be conducted to any suitable point. When the tank has been emptied, it may again be. filled with impure water and shown.

*As illustrated in Fig. 1, the beveled portion of the casting 14 forms a funnel leading to the flue 34, thereby facilitating the flow of the currents of water up through said flue, as will behereinafter described.

35v indicatesapipe whichconnects the lower e'ndof the pipe 20 to the water-jacket 9', as shown in Fig. 1. 36 indicates a pipe which connects with the as best shown in Fig. 2. 37 indicates a pipe which-communicates with the top of the tank 6 and'also by a pipe 38 with the bottom thereof, as shown in Fig. 1. 39 indicates a valve similar to the valve 22, which serves to close the pipe 38. j 40 indicates ahand-hole at the lower portion of the tank 6.

As already stated, our improved apparatus been filled, the valves 23 29 are closed, the pipe 18 being allowed to remain closed. The valve 25 in the pure-water outlet-pipe is also kept closed until the water in the tankhas been heated sufficiently to sterilize it. The

the operation above described repeated as often as may be desired.

As the impurities are removed from the water by the filter-bed such bed in time becomes foul and must bewas'hed. For this purpose the pure-water valve 25 is closed and closed by' means of the'valve 22, and the valve 39 is closed to prevent the escape of water from the tank. The result is that water from the pipe 20 passes through the pipe 26 into the lower portion of the tank 6, and this may be continued until the tank 'is full. Heat is then applied and the operation of sterilizing above described repeated. The upper'portion of the pipe 37 serves tocarry off the overflow from" the tank '6.

When the fire-pot 8 is used for heating the water in the tank, such heating is further facilitated by the water-jacket 9, the water in which becomes heated and is conducted into theupper portion of the tank 6.

We have described ourinvention in detail, but wish it to be understood that we do not wish to be restricted to the specific details of the apparatus described, except where specifically claimed, as various modifications may be made without departing from our invention.

That which we claim as our invention, and desire to secure by Letters Patent, is

1. In a sterilizing apparatus, the combination with a water-tank of a filter-tank arranged therein, means for admitting water to said water-tank, means for heating the water therein, an outlet from said filter-tank, a valve controlling said outlet, whereby the filtration of the water in said water-tank may be prevented, and means for reversing the flow of water through the filter-tank, substantially as described.

2. In a sterilizing apparatus, the combination with a water-tank of a filter-tank of less diameter, in the lower portion thereof, a coldwater coil in the upper portion of said watertank, heating apparatus below said filtertank, and a central water-passage extending from the lower to the upper portion of said water-tank through the filter-tank, whereby the water in said water-tank may be caused to circulate about said filter-tank, substan tially as described.

3. In a sterilizing apparatus, the combination with a water-tank of a filter-tank of less diameter, in the lower portion thereof, a coldwater coil in the upper portion of said watertank, heating apparatus below said filtertank, a central water-passage extending from the lower to the upper portion of said watertank through the filter-tank, and a flue communicating with the heating apparatus and 4. In a sterilizing apparatus, the combina-.

tion with a tank 6, and a filter-tank 13 therein, of a pipe 20, pipe 18 connecting said pipe 20 to said filter-tank, pipe 26 connecting said pipe 20 with said tank 6, a pure-water pipe 24 connecting with said pipe 18, and valves 22 for the pipes 18 24 respectively, substantially as described,

5. In a sterilizing apparatus, the combination with a tank 6, and a filter-tank 13 therein, of a pipe 20, pipe 18 connecting said pipe 20 to said filter-tank, pipe 26 connecting said pipe 20 with said tank 6, a pure-water pipe 24 connecting with said pipe 18, valves 22 25 for the pipes 18 24 respectively, a cold-water coil Within said tank 6, a pipe 28 connecting said coil with said pipe 20, and a valve 29 for said pipe 28, substantially as described.

6. In a sterilizing apparatus, the combination with a tank 6, and a filter-tank 13 therein, of a pipe 20, pipe 18 connecting said pipe 20 to said filter-tank, pipe 26 connecting said pipe 20 to said tank 6, a pure-water pipe 24 connecting with said pipe 18, valves 22 25 for the pipes 18 24 respectively, a cold-water coil within said tank 6, a pipe 28 connecting said coil with said pipe 20, a valve 29 for said pipe 28, an outlet-pipe 38, and a valve 39 therefor, substantially as described.

OMAR H. JEWELL.

WILLIAM M. JEWELL.

Witnesses:

JOHN L. J ACKSON, JULIA M. BRISTOL. 

